I really have mixed feelings about Harken; in many ways it reminds me of Christopher Paolini and the Inheritance Cycle, for reasons that have nothing to do with specific plot. On one hand, it's a good story written by a talented young man. On the other, bits of the story feel cliche, predictable, and too wordy overall.
Descriptions and inner monologues are great, but they shouldn't slow the story down. At one point, Nation launches into a large explanatory paragraph detailing the scene at hand, only to end it by saying "all of this faded to the background," leaving me to throw my hands up because I was reading things that, essentially, weren't important. Likewise, I don't need entire church proceedings explained to me like they are a novelty unlike that which the world has never seen. Skip the description and get to the plot.
As far as protagonists go, Michael Asher isn't that bad. I was actually really impressed by him at first, because, when faced with an assassination attempt, he actually does the sensible thing and calls the police, which is almost unheard of in non-realistic fiction. I think to myself, "Wow, this kid's got a good head on his shoulders." But then...I'm not really sure what happened. I just don't get a sense for his personality. He's known for getting Glipses, but the importance of this skill wanes as the story progresses. He's a photographer, but doesn't take many pictures. He's overwhelmed by his predicament, but that isn't a personality trait. What is he like? Who is he, really? I have so much trouble pinning him down, which makes him hard to identify with. I think that Nation partially wanted to be realistic with the story, which resulted in a lot of internal anxiety, over-thinking, and confusion, but those types of reactions to every situation gets old pretty fast.
Moving on to secondary characters...everyone just felt so static to me. Callista seems like a rip-off of Alaska Young from Looking for Alaska, or that cool-and-edgy-but-also-deeply-emotional character that you can't take your eyes off of because she's just so incredible, but I don't believe it in this case. She yells a lot and overreacts quickly, and while that's consistent (yay consistency!) it makes it hard for me to sympathize with her. I appreciate Thad as the trio's "rock" and if I'd have to chose a favorite character, it'd be him because he didn't get on my nerves too much. Don't even get me started on Spud, our token sidekick-minority-techie cliche. I felt like everyone (including Michael) was created in an attempt to make them likable, and it felt as though they were acting the way they were supposed to react, and not because it was the natural thing for them to do.
I can't quite put my finger on it, but something about Harken rubbed me the wrong way. I felt at many points like Nation was underestimating his readers; this book is targeted towards young adults, so we can grasp what's what in a story pretty quickly. Not everything needs to be tied up and explained perfectly with a neat bow on top. The fact of the matter is that I was (more or less) interested in the book while I was reading it, but every time I put it down, there wasn't a very big rush to pick it back up again. According to Goodreads, 2 stars is the equivalent of "it's okay" and that's what Harken was; just okay.